Excellent review and graphics! Subscribed.

You explained very clearly why the Polish Tu-154M crashed in Smolensk in 2010. The crew used a radio altimeter instead of a barometric altimeter while approaching landing in a thick fog over done valleys. Additionally the crew ignored reaching the decision height hoping to see the runway very soon. The aircraft found itself below the level of runway kwhich was behind the valley) and flown directly into ground which was a climbing slope of the valley before runway - controlled flight into ground.

I really love your content.Very clear explanations.Could you please do a video on the airborne weather radar please?The principle,settings,shadowing...

Wow! Thank you very much for the video 😊

Extremely helpful Thanks a lot!

Excellent video, thank you)

This channel deserve millions subscribe....keep up your good work sir

Next big thing to oxford CBTs, and even carefully explained in an easy way. Respect you for sharing this work with the aviation community. Upload more videos.

@SevenSagesRO

2 жыл бұрын

Are you talking about the oxford aviation training videos? If so, do you know where they can be found?

very informative, this one is brilliant in terms of explanation to the point, animation and focusing on what's important. You really nailed it , I've seen all your videos .Please do more video's on Radio Navigation as soon as possible . Thank you 💙

@AviationTheory

2 жыл бұрын

Hi Tejaswini, I´m glad you like the content, I´ll deal with radio navigation in the future, thanks for the suggestion!

Awesome!!

Keep going hero 💪 to day i was watching 8 videos of your videos and I'm proud of you captain 👏💙

perfect explanation

Super explanation

very good

Very good explanation. Different RA system manufacturers may use slightly different FM slew rates and limits, but they are all based upon a 4300 MHz center frequency. I once worked out the frequency change with altitude for a particular system, I believe it was the Collins, and found that it was a 20 Hz difference between transmitted and received signals per foot of altitude.

@TonyP9279

Жыл бұрын

You mean a 20Hz change in the carrier frequency or the modulated signal? What is the modulation frequency?

I adore everything you do! Your videos are so so helpful, thank you! Btw, is there any channel like this for an air traffic controllers?

@AviationTheory

2 жыл бұрын

Hi! I'm glad you like the videos. Regarding the channel for ATC, I don´t really know any.

please make a video on GPWS and EGPWS

9:07 sounds like the standard Ryanair descent rate for landing

Do you endorse one to take the faa written exam for a private pilot license?

5:09 _PLF 101 flashbacks_

But as I know frequency doesn't change while traveling in same or different medium then how could you say that frequency changes?

Gud

If radio altimeter show -4 on ground then what's mean of it

Very interesting! Although I do not really understand exactly how the new altimeter works by comparing the the received frequency with the new transmitted frequency. But the interest for the ra has come from the recent problems with the probably 5G interference. You address that at the end of this video. You say the 5G uses frequencies also used by the ra system. That is not true. In the US the top edge of 5G is 3980 MHz where as the ra works between 4200 MHz and 4400 MHz. So they are at least 220MHz apart. Juan Brown of the Balcolirio channel and some others made a video on this. However it seems that the receivers front end is not really selective. Meaning that it also allows frequencies in the 5G spectrum to come through. I am a licensed ham radio operator and it seems to me that it should be possible to make the front end of the ra's receiver insensitive for 5G signals. But I can understand that the ra receiver has to be very sensitive in order to be able to receive the weak reflections from the ground. Any filter on the receivers input lowers its sensitivity. Maybe you know more about this?

@AviationTheory

2 жыл бұрын

Hi Mark, exactly, although the RA and the 5G antennas do not use the exact same frequency, their ranges are not very far (only 220 MHz apart), specially in the spectrum assigned in the US. That’s why civil aviation authorities have been saying that there “may” be some potential interference of the 5G network with some sensitive RA, but it is not assured, they will have to make a lot of tests before getting any conclusion.

@Ztbmrc1

2 жыл бұрын

@@AviationTheory I forgot to mention, but 220MHz is a huge gap! If you look at the vhf coms radio, they used to be 25 kHz apart, and now even only 8.3333 kHz apart. If you tune in on a frequency the receiver has a sharp filter to make sure you do not have any interference from the neighboring frequency only 8.333 kHz (that is 0.008333 MHz) away.

@IAMmrhardcore

2 жыл бұрын

I can explain that first question for you a bit. The frequency varies in a predictable pattern, like imagine slowly (but constantly) increasing from 4200MHz to 4400MHz over the course of 1s then starting over. You can plot that simple equation on a frequency x time graph, meaning you can calculate at any point what the frequency should be from the time you turn on the machine (start transmitting the frequency function). So when you receive, and see what frequency you're receiving, you can very quickly determine the delay by comparing the received frequency to the currently transmitted frequency, then just plugging in the value to your function. This is done because instead of just sending out pulses every x ms, you can just constantly transmit and then not even have to worry about missing times when there was a poor reflection, or missing a large thin tower below, you can have constant uninterrupted feedback. This also allows you to do some smoothing of your values with more accuracy incase there were outliers received from some sort of interference.

It may and the radio hight is sdr so it can change cell 5g is not all the time at 5ghz

error of operation in radio altimeter?

But sometimes we are told that mobile devices on or off dont affect the plane?

@AviationTheory

Жыл бұрын

It depends on the number of devices used, the equipment and instrumentation of the aircraft, and the frequency band used by the devices. So yes, there could be cases in which the use of this devices don’t affect the plane, but under certain conditions they can potentially interfere with some instruments.

altimeter , ground receiving antennae speed of light transmitting antennae 4400 MHz bounces back to the receiving antennae the difference between the transmitted wave and the receiving wave .. residual height .... landing gear giving higher residual height ............. irregularities of terrain attributing to the difference in the transmission wave and receiving wave too much interference due to the difference in the reference height and irregularities of terrain changes the ils cat 1 instrument landing system cat ground proximity callouts approaching minimums too low terrain pitch and bank limits are limitations of altimeter

... be ...

How do radar altimeters work? How does 5G C - band cellular work? How does 5G C - band affect the way radar altimeters work? FAA vs FCC ... FIGHT! lol

Works, not Work.